have you tried following link http://spectruminfo.ofcom.org.uk/spectrumInfo/licences you can find most pmr frequencies
just enter the grid coordinates for your location ie TL 240 240 the frequency range and distance try avoiding uk general frequencies ie 173.0875 as you will get uk wide results. you'll be surprised what you find much more up to date than books !

Hi all got book out of maplins today , think it came out last year , but comes with cd ,cant get hang of cd yet but it seems to b up to date. has some good frequencies in , called ULTIMATE SCANNING GUIDE , £19.75,
don't show cts tones but bit detective work you should b able sort it.
cheers Don..